Basically I have 6 BES's and 3 different exchanges. The CDO.dll do not match up on the BES and Exchange. Some of the users are not getting calendar sync. I am out of the office till next week and they are desperate for calender sync. So as a short term fix till I can get back in and match them up I have set them up with desktop manager to do a wired sync. However, it kept erroring saying that it was still wirelessly set to sync. So...went on the bes5 user / organizer data synchronisation & turned off synchronisation to addressbook, tasks, memos. I just couldn't find out where the removing wireless sync was. On the handset he had it turned to off on the wireless sync.
It's just a short term measure till I can get the CDO.dll matched again on all the exchanges and the BES.